CVE-2015-2694

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mit:kerberos_5:1.12:*:*:*:*:*:*:*", "matchCriteriaId": "79A9FAE9-7219-4D6A-9E94-FFE20223537D", "vulnerable": true}, {"criteria": "cpe:2.3:a:mit:kerberos_5:1.12.1:*:*:*:*:*:*:*", "matchCriteriaId": "EA68BC90-FCFC-4C9B-8574-9029DB2358E9", "vulnerable": true}, {"criteria": "cpe:2.3:a:mit:kerberos_5:1.12.2:*:*:*:*:*:*:*", "matchCriteriaId": "9D0A28CB-173D-4676-B083-E3718213B840", "vulnerable": true}, {"criteria": "cpe:2.3:a:mit:kerberos_5:1.12.3:*:*:*:*:*:*:*", "matchCriteriaId": "AA3D2861-7EB7-4984-AC92-989B427BDB58", "vulnerable": true}, {"criteria": "cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*", "matchCriteriaId": "169D00BD-344F-453C-BE7C-9DF0740080BB", "vulnerable": true}, {"criteria": "cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:*", "matchCriteriaId": "765B3248-A524-4A79-858C-E787C1C1599E", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c."}, {"lang": "es", "value": "Los m\u00f3dulos kdcpreauth en MIT Kerberos 5 (tambi\u00e9n conocido como krb5) 1.12.x y 1.13.x anterior a 1.13.2 no rastrea correctamente si la solicitud de un cliente ha sido validada, lo que permite a atacantes remotos evadir un requisito de preautenticaci\u00f3n mediante la provisi\u00f3n de (1) cero bytes de datos o (2) un nombre de \u00e1mbito (realm) arbitrario, relacionado con plugins/preauth/otp/main.c y plugins/preauth/pkinit/pkinit_srv.c."}], "id": "CVE-2015-2694", "lastModified": "2026-06-17T00:24:34.020", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2015-05-25T19:59:02.407", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160"}, {"source": "cve@mitre.org", "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/74824"}, {"source": "cve@mitre.org", "url": "http://www.ubuntu.com/usn/USN-2810-1"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/bid/74824"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.ubuntu.com/usn/USN-2810-1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-264"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2015:2154", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "krb5-0:1.13.2-10.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-11-19T00:00:00Z"}], "bugzilla": {"description": "krb5: issues in OTP and PKINIT kdcpreauth modules leading to requires_preauth bypass", "id": "1216133", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1216133"}, "csaw": false, "cvss": {"cvss_base_score": "5.8", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "status": "verified"}, "details": ["The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.", "A flaw was found in the OTP kdcpreauth module of MIT Kerberos. A remote attacker could use this flaw to bypass the requires_preauth flag on a client principal and obtain a ciphertext encrypted in the principal's long-term key. This ciphertext could be used to conduct an off-line dictionary attack against the user's password."], "name": "CVE-2015-2694", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2015-04-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-2694\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-2694"], "statement": "This issue does not affect the version of krb5 package as shipped with Red Hat Enterprise Linux 5 and 6.", "threat_severity": "Moderate"}

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